R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT Measurement Examples
Port Conversion
Operating Manual 1145.1084.12 – 30 87
1. Connect ports 1 and 3 of a 3- or 4-port analyzer to the balanced ports of the DUT, connect port 2
to the single ended port of the DUT.
2. Click Channel – Mode – Port Config... – Balanced Ports and Port Groups... Predefined Configs
and define the appropriate balanced port configuration (see also Balanced Measurement
Examples), combining ports 1 and 3 of the analyzer to logical port no. 1.
3. Establish the necessary Channel settings (sweep range and type etc.) and select the measured
quantities (Trace – Measure).
4. Click Channel – Mode – Virtual Transform – Balanced Port Embedding to open the Balanced Port
Embedding... dialog.
In the dialog, the Logical Port no. 1 (the only balanced port) is already selected. To add a virtual network,
do one of the following:
5. If you wish to define the added network by an imported set of 4-port S-parameters, select the 4-
Port transformation network, click Read Data From File, and load the parameters from a 4-port (*.s4p)
Touchstone file.
6. If you wish to define the added network by an equivalent circuit, select the circuit type and adjust
the parameters R, C, and L displayed in the right half of the dialog.
7. If you wish to use a combination of 2-port S-parameters and lumped circuit elements, select the
appropriate Serial 2-Port.. transformation network, import the 2-port files for each of the physical ports 1
and 3, and adjust the remaining R, C, and L parameters.
8. Click Embed DUT and Close the dialog.
The traces of the active channel show the characteristics of the DUT including the virtual transformation
network inserted between the logical port 1 of the analyzer and the balanced DUT port.
To remove a real transformation network from a balanced port...
Suppose that your DUT has a single-ended and a balanced port and a real, known 4-port transformation
network at the balanced port.
1. Connect the DUT (including the transformation network) to your 3- or 4-port analyzer: Connect
ports 1 and 3 of the analyzer to the outer connectors of the transformation network, connect port 2
to the single ended port of the DUT.
2. Click Channel – Mode – Port Config... – Balanced Ports and Port Groups... Predefined Configs
and define the appropriate balanced port configuration (see also Balanced Measurement
Examples), combining ports 1 and 3 of the analyzer to logical port no. 1.
3. Establish the necessary Channel settings (sweep range and type etc.) and select the measured
quantities (Trace – Measure).
4. Click Channel – Mode – Virtual Transform – Balanced Port Deembedding to open the Balanced
Port Deembedding... dialog.
In the dialog, the Logical Port no. 1 (the only balanced port) is already selected. To virtually remove the
physical network, do one of the following:
5. If you wish to describe the network by an imported set of 4-port S-parameters, select the 4-Port
transformation network, click Read Data From File, and load the parameters from a 4-port (*.s4p)
Touchstone file.
6. If you wish to describe the network by an equivalent circuit, select the circuit type and adjust the
parameters R, C, and L displayed in the right half of the dialog.
7. If you wish to use a combination of 2-port S-parameters and lumped circuit elements, select the
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